Glue-heater.



No. 655,227. Patnted Aug. 7. I900. F. N. HASTINGS.

GLUE HEATER.

(Application filed July 24, 1899.)

(No Model.)

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UNITED STATES PATENT OFFICE.

FRANK N. HASTINGS, OF MERIDEN, CONNECTICUT.

c LU E-HEATER. Y

SIEGIFIOATION forming part of Letters Patent No. 655,227, dated August7, 1900.

Application filed July 24, 1899.

To all whom it may concern:

Be it known that I, FRANK N. HASTINGS, a citizen of the United States,and a resident of Meriden, in the county of New Haven and State ofConnecticut, have invented certain new and useful Improvements inGlue-Heaters, of which the following is a specification.

My invention relates to improvements in heating devices in which aninner vessel is employed as a receptacle for the substance to be heated,the said inner vessel being surrounded by an annular case susceptible ofcontaining a heated medium, as water, for the purpose of its conductingto the inner vessel a portion of its heat. This outer case may be, andusually is, arranged at its upper end to come in Contact with and tosupport the inner vessel, forming a joint more or less tight. The lowerend of this case rests normally upon a hollow metallic base, throughwhich is allowed to pass a jet or current of steam, so that its heat maybe imparted by metallic contact to the medium contained in the outercase and thence to the inner vessel, which is immersed therein.

My invention relates more particularly to the means employed foradjusting the outer case in relation to the base, so that thetemperature of the substance to be heated may be under control. It isobvious that if the direct surface contact be broken between the outercase and base, even if but little space intervenes, less ,heat will betransmitted.

I attain these objects by the construction illustrated in theaccompanying drawings, in which- Figure 1 is a side elevation of theassembled device, showing the outer vessel A slightly raised from thebase B. Fig. 2 is a side elevation of the assembled device, showing theouter vessel A in contact with the base B.

a section of the outer case A, turned so as to be out of contact.

The means which I employ consist of an an- Serial No. '724,994.' (Nomodel.)

nular ring or plate A, riveted or otherwise secured to the bottom of theouter case A or integral with it, having several downwardlyprojectinglugs A arranged as shown in Fig.

3. Through the part of the annular steambase B, that forms its bottom,are holes (see Fig. 4) corresponding to the projections on the bottom ofthe outer case A, Fig. 3. Now if the said outer case be raised andpartly revolved its weight, with that of the inner vessel, its contents,and the conducting medium, will be sustained by the projections on itsbottom resting upon the inner upper surface of the bottom of the pit oropening in the annular steam-base, as shown in Fig. 1; but if theprojections are permitted to enter the holes in the said steam-base theouter case will rest upon its seat, as in Fig. 2, and a.

greater amount of heat will be transmitted, because of the close contactof the larger heating area. In order to still further reduce the surfacecontact between the outer case and steam-base, I may also, in place ofmaking the lower part of the outer case of a continuous circular form,flatten it upon two opposite sides, so that a full quarter-turn willentirely remove it fronuconta'ct with the steam-base except for a smallamount of area contained in the ends of the projections. In this device1 form the interior walls of the steam-base in the shape shown in Figs.5 and 6, which is in effect circular, but of two different radii, theportion that forms one-quarter of the circumference on each of the twoopposite sides agreeing with that of the lower end of the outer case,while on the sides adjacent to these the walls are carried back, so asto be out of contact with the said outer case at all times.

I am aware that previous to my invention heating devices have been madewith provisions for adjusting or controlling the heat delivered to theinner vessel. I therefore do not claim such a combination broadly; but

What I do claim as my invention, and desire to secure by Letters Patent,is-

1. The combination, in a steam heater, adapted to be used with an innervessel of-a circular outer case having a bottom of smaller diameter andflattened on two opposite sides, and of a hollow steam chamber or base,having a semi-annular central cavity and oppobers leading outwardly fromsaid cavity, all

sitely-disposed segmentallyrecessed chamsubstantially as set forth.

2. The combination, in a steam heater, adapted to be used with an innervesse'l,'of a circular outer case, having its lower end of lesserdiameter than its body, and flattened on two opposite sides, and of anannular base, cored for the passage of a current of steam, having asemi-annular central cavity and two oppositely disposed segmentallyrecessed v chambers leading outwardly from the central cavity; a seriesof projections forming a part of and depending downwardly from the lowereiid of theout'er c'ase,- and a corresponding se- 15 ries of holesextending through the bottom of the cavity or depressed central portionof the steam baSe, all substantially as described and for the purpose asset forth.

In testimony whereof I have affixed my sig- 2 nature in presence of twowitnesses.

- FRANK N. HASTINGS.

Witnesses:

. A BERT G. KUHNLE,

CLARENCE L. PIERRE.

